The Event Horizon Telescope Collaboration, Kazunori Akiyama, Ezequiel Albentosa-Ruíz, Antxon Alberdi, Walter Alef, Juan Carlos Algaba, Richard Anantua, Keiichi Asada, Rebecca Azulay, Uwe Bach, Anne-Kathrin Baczko, David Ball, Mislav Baloković, Bidisha Bandyopadhyay, John Barrett, Michi Bauböck, A. Bradford Benson, Dan Bintley, Lindy Blackburn, Raymond Blundell, L. Katherine Bouman, C. Geoffrey Bower, Michael Bremer, Roger Brissenden, Silke Britzen, E. Avery Broderick, Dominique Broguiere, Thomas Bronzwaer, Sandra Bustamante, F. Douglas Carlos, E. John Carlstrom, Andrew Chael, Chi-kwan Chan, O. Dominic Chang, Erandi Chavez, Koushik Chatterjee, Shami Chatterjee, Ming-Tang Chen, Yongjun Chen, Xiaopeng Cheng, Paul Chichura, Ilje Cho, Pierre Christian, S. Nicholas Conroy, E. John Conway, M. Thomas Crawford, B. Geoffrey Crew, Alejandro Cruz-Osorio, Yuzhu Cui, Brandon Curd, Rohan Dahale, Jordy Davelaar, Mariafelicia De Laurentis, Roger Deane, Gregory Desvignes, Jason Dexter, Vedant Dhruv, K. Indu Dihingia, S. Sheperd Doeleman, A. Sergio Dzib, P. Ralph Eatough, Razieh Emami, Heino Falcke, Joseph Farah, L. Vincent Fish, Edward Fomalont, H. Alyson Ford, Marianna Foschi, Raquel Fraga-Encinas, T. William Freeman, Per Friberg, M. Christian Fromm, Antonio Fuentes, Peter Galison, F. Charles Gammie, Roberto García, Olivier Gentaz, Boris Georgiev, Ciriaco Goddi, Roman Gold, I. Arturo Gómez-Ruiz, L. José Gómez, Minfeng Gu, Mark Gurwell, Kazuhiro Hada, Daryl Haggard, Ronald Hesper, Dirk Heumann, C. Luis Ho, Paul Ho, Dan Hoak, Mareki Honma, L. Chih-Wei Huang, Lei Huang, H. David Hughes, Shiro Ikeda, C.M. Violette Impellizzeri, Makoto Inoue, Sara Issaoun, J. David James, T. Buell Jannuzi, Michael Janssen, Britton Jeter, Wu Jiang, Alejandra Jiménez-Rosales, D. Michael Johnson, Svetlana Jorstad, C. Adam Jones, V. Abhishek Joshi, Taehyun Jung, Ramesh Karuppusamy, Tomohisa Kawashima, K. Garrett Keating, Mark Kettenis, Dong-Jin Kim, Jae-Young Kim, Jongsoo Kim, Junhan Kim, Motoki Kino, Jun Yi Koay, Prashant Kocherlakota, Yutaro Kofuji, M. Patrick Koch, Shoko Koyama, Carsten Kramer, A. Joana Kramer, Michael Kramer, P. Thomas Krichbaum, Cheng-Yu Kuo, Noemi La Bella, Deokhyeong Lee, Sang-Sung Lee, Aviad Levis, Zhiyuan Li, Rocco Lico, Greg Lindahl, Michael Lindqvist, Mikhail Lisakov, Jun Liu, Kuo Liu, Elisabetta Liuzzo, Wen-Ping Lo, P. Andrei Lobanov, Laurent Loinard, J. Colin Lonsdale, E. Amy Lowitz, Ru-Sen Lu, R. Nicholas MacDonald, Jirong Mao, Nicola Marchili, Sera Markoff, P. Daniel Marrone, P. Alan Marscher, Iván Martí-Vidal, Satoki Matsushita, D. Lynn Matthews, Lia Medeiros, M. Karl Menten, Izumi Mizuno, Yosuke Mizuno, Joshua Montgomery, M. James Moran, Kotaro Moriyama, Monika Moscibrodzka, Wanga Mulaudzi, Cornelia Müller, Hendrik Müller, Alejandro Mus, Gibwa Musoke, Ioannis Myserlis, Hiroshi Nagai, M. Neil Nagar, G. Dhanya Nair, Masanori Nakamura, Gopal Narayanan, Iniyan Natarajan, Antonios Nathanail, Santiago Navarro Fuentes, Joey Neilsen, Chunchong Ni, A. Michael Nowak, Junghwan Oh, Hiroki Okino, Héctor Raúl Olivares Sánchez, Tomoaki Oyama, Feryal Özel, C.M. Daniel Palumbo, Georgios Filippos Paraschos, Jongho Park, Harriet Parsons, Nimesh Patel, Ue-Li Pen, W. Dominic Pesce, Vincent Piétu, Alexander Plavin, Aleksandar PopStefanija, Oliver Porth, Ben Prather, Giacomo Principe, Dimitrios Psaltis, Hung-Yi Pu, Alexandra Rahlin, Venkatessh Ramakrishnan, Ramprasad Rao, G. Mark Rawlings, Luciano Rezzolla, Angelo Ricarte, Luca Ricci, Bart Ripperda, Jan Röder, Freek Roelofs, Cristina Romero-Cañizales, Eduardo Ros, Arash Roshanineshat, Helge Rottmann, L. Alan Roy, Ignacio Ruiz, Chet Ruszczyk, L.J. Kazi Rygl, D.S. León Salas, Salvador Sánchez, David Sánchez-Argüelles, Miguel Sánchez-Portal, Mahito Sasada, Kaushik Satapathy, Saurabh , Tuomas Savolainen, F. Peter Schloerb, Jonathan Schonfeld, Karl-Friedrich Schuster, Lijing Shao, Zhiqiang Shen, Sasikumar Silpa, Des Small, Randall Smith, Bong Won Sohn, Jason SooHoo, Kamal Souccar, S. Joshua Stanway, He Sun, Fumie Tazaki, J. Alexandra Tetarenko, Paul Tiede, P.J. Remo Tilanus, Michael Titus, Kenji Toma, Pablo Torne, Teresa Toscano, Efthalia Traianou, Tyler Trent, Sascha Trippe, Matthew Turk, Ilse van Bemmel, Huib Jan van Langevelde, R. Daniel van Rossum, D. Sebastiano von Fellenberg, Jesse Vos, Jan Wagner, Derek Ward-Thompson, John Wardle, E. Jasmin Washington, Jonathan Weintroub, T. Andrew West, Robert Wharton, Maciek Wielgus, Kaj Wiik, Gunther Witzel, F. Michael Wondrak, N. George Wong, Jompoj Wongphexhauxsorn, Qingwen Wu, Nitika Yadlapalli, Paul Yamaguchi, Aristomenis Yfantis, Doosoo Yoon, André Young, Ziri Younsi, Wei Yu, Feng Yuan, Ye-Fei Yuan, Ai-Ling Zeng, J. Anton Zensus, Shuo Zhang, Guang-Yao Zhao, Shan-Shan Zhao, Ryan Berthold, Shu-Hao Chang, Ryan Chilson, Chih-Chiang Han, M. David Gale, Gertie Geertsema, José Luis Hernández-Rebollar, Yau-De Huang, P. Ryan Keenan, Derek Kubo, Kuan-Yu Liu, L. Pierre Martin-Cocher, Daniel Michalik, Alfredo Montaña, Andrew Nadolski, Peter Oshiro, A. Philippe Raffin, Iván Rodríguez-Montoya, Ta-Shun Wei, R. Matthew Young